[PATCH iwl-net] idpf: fix LAN memory regions command on some NVMs

[Larysa Zaremba <larysa.zaremba@intel.com>]

IPU SDK versions 1.9 through 2.0.5 require send buffer to contain a single
empty memory region. Set number of regions to 1 and use appropriate send
buffer size to satisfy this requirement.

Suggested-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
---
 drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
index fa3ce1e4f6ac..af8b3ebee4d4 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
@@ -1016,6 +1016,9 @@ static int idpf_send_get_lan_memory_regions(struct idpf_adapter *adapter)
 	struct idpf_vc_xn_params xn_params = {
 		.vc_op = VIRTCHNL2_OP_GET_LAN_MEMORY_REGIONS,
 		.recv_buf.iov_len = IDPF_CTLQ_MAX_BUF_LEN,
+		.send_buf.iov_len =
+			sizeof(struct virtchnl2_get_lan_memory_regions) +
+			sizeof(struct virtchnl2_mem_region),
 		.timeout_ms = IDPF_VC_XN_DEFAULT_TIMEOUT_MSEC,
 	};
 	int num_regions, size;
@@ -1028,6 +1031,8 @@ static int idpf_send_get_lan_memory_regions(struct idpf_adapter *adapter)
 		return -ENOMEM;
 
 	xn_params.recv_buf.iov_base = rcvd_regions;
+	rcvd_regions->num_memory_regions = cpu_to_le16(1);
+	xn_params.send_buf.iov_base = rcvd_regions;
 	reply_sz = idpf_vc_xn_exec(adapter, &xn_params);
 	if (reply_sz < 0)
 		return reply_sz;
-- 
2.47.0